1. After a mid-season lull, a healthy Seahawks defense is once again channeling its dominant 2013 form. Kelly acknowledged Thursday that the Legion of Boom will be the best secondary the Eagles face all season. The Seahawks are coming off back-to-back games without allowing a touchdown, the first defense to accomplish that feat this season. They are now first in yards allowed, surrendering just 12 more per game than last year's historically great unit. With Kam Chancellor and Byron Maxwell healthy, this is once again the NFL's premier defense.

3. While Russell Wilson's underwhelming wide receiver corps has garnered negative press, it's the offensive line that has been a bigger problem. That presents a problem against an underrated Eagles front seven that features Connor Barwin, the NFL's hottest pass rusher. Don't overlook the hogs up front, as defensive end Fletcher Cox is enjoying a Pro Bowl season.

4. For all the mid-season handwringing over LeSean McCoy, he's averaging more rushing yards per game (103.3) since right tackle Lane Johnson returned in Week 5 than he did in his 2013 career year (100.4). After upping that average to 144.5 over the past two weeks, it will interesting to see if he can sustain that success against a Seahawks run defense that has improved with the return of middle linebacker Bobby Wagner and the resurgence of veteran defensive tackle Kevin Williams.

5. Jordan Matthews has been one of the NFL's hottest receivers since Sanchez took over, posting over 100 yards more than the next-closest slot receiver during that span. He's on pace for 72 receptions, 914 yards and nine touchdowns, which would be the best season by an Eagles rookie since Bill Groman in 1960. Bigger than the average slot receiver, Matthews has a better chance of beating the jam against Seattle's physical defensive backs.

6. Carroll had high praise for Kelly this week as a master innovator, but later insisted his team has no concerns about the Eagles' fast-paced offense. It will be interesting to see which side wins the tempo battle.